Compare Arrays in Extendscript

[Dan Ebberts]

If you’re using the JavaScript engine, something like this should work:

myLayers = [1,12];
containingLayers = [1,2,3,4,5];
success = true;
for (var i = 0; i < myLayers.length; i++){
  if (! containingLayers.includes(myLayers[i])){
    success = false;
    break;
  }
}
success

[Rodrigo Aben]

Function .includes does not exist on extendscript

[Dan Ebberts]

I’m guessing you either have File > Project Settings > Expressions > Expression Engine set to Legacy Extendscript (instead of JavaScript) or you’re running an old version of AE

[Filip Vandueren]

If you need it in scripting, it’s easier to implement with indexOf(). This is also not in Extendscript, but it is a bit easier to ‘polyfill’:

if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function(obj, start) {
        for (var i = (start || 0), j = this.length; i < j; i++) {
            if (this[i] === obj) { return i; }
        }
        return -1;
    }
}

myLayers = [1,12];
containingLayers = [1,2,3,4,5];
success = true;
for (var i = 0; i < myLayers.length; i++){
  if (containingLayers.indexOf(myLayers[i])==-1) {
    success = false;
    break;
  }
}
succes;

(Haven’t tested this)

[Rodrigo Aben]

That solved beautifully, Filip. Thanks a lot!